Heating-furnace with removable hearth



lA. F. DELACOURT.l

. l 1918. I 1,401,054. Patented 109020,1921.r

- UNITED sTA'rss PATNT OFFICEQ ALBERTO FRANCESCO DELACOURT, 0F GENOA, ITALY, -ASSIGNR TO SOCIET ANONIMA ITALIANA GIO, [INSALDO 95 C., 0F GENOA, ITALY.

yHELAIINGr-FURllTILLCEl WITH REIIIOVABLE I-IEAIRTH.

IAULOL Application led April 23, 1918.

T 0 all whom it may concern.'

Be 1t known that I, Lanaro FnaNonsoo DnLAooUn'r, engineer, a subject of the King Yof Italy, and residing "at Genoa Italy (whose post-ofnce address is Scalinata Gsservatorio No. l, Genoa,) have invented certain new and useful Improvements in or .Relating to lileating-Furnaces with Remow able Hearths, of which the following is a specification.

This invention relates to improvements in heating furnaces with removable hearth or bottom, in which the draft is obtained through the hearth itself, the object in view being that of having a uniform temperature within the furnace.

This object is attained by the construction illustrated in the accompanying drawing, in which Figure l is a vertical section of the lower part of ay furnace with removable hearth. F ig. 2 `is a horizontal sectional view taken on line 2-2 of Fig. l.

In the ordinary furnaces of the general type the temperature withinV the furnace cannot be completely uniform, since the source of heat is placed at one side only, the opposite side being used to exhaust the combustion products, and the remaining two sides being provided with doors.

Therefrom, `it ensues that the blocks, ingots and the like heated in such removable hearth furnaces, cannot be subjected to an uniform temperature both in the upperl and lower portion not even when said ingots or the like are placed on suitably arranged supports to insulate them from the hearth. and cause them to be lwell enveloped by the flames. Y f

All this isdue to the fact that the hearth is the coolest party of the furnace, since the Specification of Letters Patent.

Patented Bec. 20, 1921.

serial No. 230,226.

draft is produced from kthe side opposite to that from which the heat is supplied without passing through it.

According to my present invention, to eliminate this inconvenience, which may produce a nonsuniformity in the material heated in the furnace, the draft is obtained through the hearth itself, it being rendered perfectly tight by means of the packing device -B-- The combination gases pass downwardly through the openings-flof the hearth, collect at -C-, and finally pass to the heat accumulators or to the chimney.

I claiml. A furnace comprising a hearth for supporting the objects to be heated, said heart-h being provided at various places of its area, with down-draft exit ports, whereby the hot gases can iind vexit from the furnace simul taneously at a large number of places, the

sides of the hearthbeing luted to prevent gas exit around the hearth.

2,. A. furnace for heating articles, said furnace having a movable hearth mounted on a truck, the sides of the said hearth being lut-ed to prevent the exit of gases, said hearth be ing provided at various places of Its-area with a multiplicity of down-draft exit openings for carrying oil' gases from all parts of the hearth, and flues in furnace walls connecting with the said downdraftropenings for carrying ofi' the gases.

In testimony whereof I 'have hereunto signed my name in the presence of two witnesses. t

ALBERTO FRANCESCO DELACOURT. Witnesses:

DOMENICO VoLLA,

EMILIO OLIvARI. 

